Many people use Raspberry Pi for retro gaming consoles, controlling smart home devices and as a media center. You can also use it as a desktop computer if you install an operating system. Raspberry Pi computers operate like any other computer, with an operating system and an internet connection that is as secure as you make it.
You're responsible for taking the necessary measures to ensure the security of your information. Yes, your Raspberry Pi computer will require a microSD card. This is where your operating system and all your files live.
The computers run a Linux OS, which will be stored on the SD card..
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What's a Raspberry Pi? How You Can Use It for Your Home’s Internet

CNET takes a look at this budget-friendly, pocket-sized computer.